JVC KD-A305J User manual
SERVICE MANUAL
COPYRIGHT © 2009 Victor Company of Japan, Limited No.MA429<Rev.002>
2009/8
CD RECEIVER
MA429<Rev.002>20098SERVICE MANUAL
KD-A305J, KD-R300J, KD-R404UI,
KD-R405U, KD-R405UN, KD-R405UT,
KD-R405UH, KD-R406U, KD-R406UN,
KD-R406UT, KD-R406UH, KD-S26J
COPYRIGHT © 2009 Victor Company of Japan, Limited
Lead free solder used in the board (material : Sn-Ag-Cu, melting point : 219 Centigrade)
Lead free solder used in the board (material : Sn-Cu, melting point : 230 Centigrade)
TABLE OF CONTENTS
1 PRECAUTION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4
2 SPECIFIC SERVICE INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-7
3 DISASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-8
4 ADJUSTMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-17
5 TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-22
KD-A305/KD-R300/KD-S26
1-2 (No.MA429<Rev.002>)
SPECIFICATION
KD-A305/KD-R300/KD-S26
AUDIO AMPLIFIER SECTION
Power Output 20 W RMS ×4 Channels at 4 Ωand < or = 1%
THD+N
Amplifier Power Standard
Signal-to-Noise Ratio 80 dBA (reference: 1 W into 4 Ω)
Load Impedance 4 Ω(4 Ωto 8 Ωallowance)
Tone Control Range Bass ±12 dB (60 Hz 80 Hz 100 Hz 120 Hz) Q0.5 Q1.0 Q1.5 Q2.0
Middle ±12 dB (500 Hz 1.0 kHz 1.5 kHz 2.5 kHz) Q0.75 Q1.0
Q1.25 Q1.5
Treble ±12 dB (7.5 kHz 10.0 kHz 12.5 kHz 15.0 kHz) Q0.75 Q1.25
Frequency Response 40 Hz to 20 000 Hz
Line-Out Level/
Impedance
KD-A305 5.0 V/20 kΩload (full scale)
KD-R300/KD-S26 2.5 V/20 kΩload (full scale)
Subwoofer-Out Level/
Impedance
KD-A305 5.0 V /20 kΩload (full scale)
KD-R300/KD-S26 2.5 V/20 kΩload (full scale)
Output Impedance 1 kΩ
Other Terminal AUX (auxiliary) input jack CD changer jack Steering wheel
remote input (only for KD-A305) Antenna input
TUNER SECTION
Frequency Range FM with channel interval set to 100 kHz or 200 kHz 87.5 MHz to 107.9 MHz
with channel interval set to 50 kHz 87.5 MHz to 108.0 MHz
AM with channel interval set to 10 kHz 530 kHz to 1 710 kHz
with channel interval set to 9 kHz 531 kHz to 1 602 kHz
FM Tuner Usable Sensitivity 11.3 dBf (1.0 µV/75 Ω)
50 dB Quieting Sensitivity 16.3 dBf (1.8 µV/75 Ω)
Alternate Channel Selectivity (400 kHz) 65 dB
Frequency Response 40 Hz to 15 000 Hz
Stereo Separation 35 dB
AM Tuner Sensitivity 20 µV
Selectivity 35 dB
CD PLAYER SECTION
Type Compact disc player
Signal Detection System Non-contact optical pickup (semiconductor laser)
Number of Channels 2 channels (stereo)
Frequency Response 5 Hz to 20 000 Hz
Dynamic Range 96 dB
Signal-to-Noise Ratio 98 dB
Wow and Flutter Less than measurable limit
MP3 Decoding Format:
(MPEG1/2 Audio Layer 3)
Max. Bit Rate 320 kbps
WMA (Windows Media®
Audio) Decoding Format
Max. Bit Rate 192 kbps
GENERAL
Power Requirement Operating Voltage DC 14.4 V (11 V to 16 V allowance)
Grounding System Negative ground
Allowable Operating Temperature 0°C to +40°C (32°F to 104°F)
Dimensions (W ×H ×D):
(approx.)
Installation Size 182 mm ×52 mm ×160 mm (7-3/16” ×2-1/16” ×6-5/16”)
Panel Size 188 mm ×58 mm ×6 mm (7-7/16” ×2-5/16” ×1/4”)
Mass 1.3 kg (2.9 lbs) (excluding accessories)
(No.MA429<Rev.002>)1-3
KD-R406/KD-R405/KD-R404
Design and specifications are subject to change without notice.
AUDIO AMPLIFIER SECTION
Maximum Power Output Front/Rear 50 W per channel
Continuous Power Output
(RMS)
Front/Rear 19 W per channel into 4 Ω40 Hz to 20 000 Hz at no more than 0.8% total
harmonic distortion.
Load Impedance 4 Ω(4 Ωto 8 Ωallowance)
Tone Control Range Bass ±12 dB (60 Hz 80 Hz 100 Hz 120 Hz) Q0.5 Q1.0 Q1.5 Q2.0
Middle ±12 dB (500 Hz 1.0 kHz 1.5 kHz 2.5 kHz) Q0.75 Q1.0 Q1.25 Q1.5
Treble ±12 dB (7.5 kHz 10.0 kHz 12.5 kHz 15.0 kHz) Q0.75 Q1.25
Frequency Response 40 Hz to 20 000 Hz
Signal-to-Noise Ratio 70 dB
Line-Out Level/Impedance 2.5 V/20 kΩload (full scale)
Subwoofer-Out Level/Impedance 2.5 V/20 kΩload (full scale)
Output Impedance 1 kΩ
Other Terminal AUX (auxiliary) input jack CD changer jack Antenna input
TUNER SECTION
Frequency Range FM 87.5 MHz to 108.0 MHz
AM 531 kHz to 1602 kHz
FM Tuner Usable Sensitivity 11.3 dBf (1.0 µV/75 Ω)
50 dB Quieting Sensitivity 16.3 dBf (1.8 µV/75 Ω)
Alternate Channel Selectivity
(400 kHz)
65 dB
Frequency Response 40 Hz to 15000 Hz
Stereo Separation 30 dB
AM Tuner Sensitivity 20 µV
Selectivity 35 dB
CD PLAYER SECTION
Type Compact disc player
Signal Detection System Non-contact optical pickup (semiconductor laser)
Number of Channels 2 channels (stereo)
Frequency Response 5 Hz to 20 000 Hz
Dynamic Range 96 dB
Signal-to-Noise Ratio 98 dB
Wow and Flutter Less than measurable limit
MP3 Decoding Format (MPEG1/2 Audio Layer 3) Max. Bit Rate: 320 kbps
WMA (Windows Media®Audio) Decoding Format Compact disc player Max. Bit Rate: 192 kbps
GENERAL
Power Requirement Operating Voltage DC 14.4 V (11 V to 16 V allowance)
Grounding System Negative ground
Allowable Operating Temperature 0°C to +40°C
Dimensions (W ×H ×D):
(approx.)
Installation Size 182 mm ×52 mm ×160 mm
Panel Size 188 mm ×58 mm ×6 mm
Mass 1.3 kg (excluding accessories)
1-4 (No.MA429<Rev.002>)
SECTION 1
PRECAUTION
1.1 Safety Precautions
!Burrs formed during molding may be left over on some parts of the chassis. Therefore,
pay attention to such burrs in the case of preforming repair of this system.
!Please use enough caution not to see the beam directly or touch it in case of an
adjustment or operation check.
(No.MA429<Rev.002>)1-5
1.2 Preventing static electricity
Electrostatic discharge (ESD), which occurs when static electricity stored in the body, fabric, etc. is discharged, can destroy the laser
diode in the traverse unit (optical pickup). Take care to prevent this when performing repairs.
1.2.1 Grounding to prevent damage by static electricity
Static electricity in the work area can destroy the optical pickup (laser diode) in devices such as laser products.
Be careful to use proper grounding in the area where repairs are being performed.
(1) Ground the workbench
Ground the workbench by laying conductive material (such as a conductive sheet) or an iron plate over it before placing the
traverse unit (optical pickup) on it.
(2) Ground yourself
Use an anti-static wrist strap to release any static electricity built up in your body.
(3) Handling the optical pickup
• In order to maintain quality during transport and before installation, both sides of the laser diode on the replacement optical
pickup are shorted. After replacement, return the shorted parts to their original condition.
(Refer to the text.)
• Do not use a tester to check the condition of the laser diode in the optical pickup. The tester's internal power source can easily
destroy the laser diode.
1.3 Handling the traverse unit (optical pickup)
(1) Do not subject the traverse unit (optical pickup) to strong shocks, as it is a sensitive, complex unit.
(2) Cut off the shorted part of the flexible cable using nippers, etc. after replacing the optical pickup. For specific details, refer to the
replacement procedure in the text. Remove the anti-static pin when replacing the traverse unit. Be careful not to take too long a
time when attaching it to the connector.
(3) Handle the flexible cable carefully as it may break when subjected to strong force.
(4) It is not possible to adjust the semi-fixed resistor that adjusts the laser power. Do not turn it.
1.4 Attention when traverse unit is decomposed
*Please refer to "Disassembly method" in the text for the pickup unit.
• Apply solder to the short land before the card wire is disconnected from the connector on the pickup unit.
(If the card wire is disconnected without applying solder, the pickup may be destroyed by static electricity.)
• In the assembly, be sure to remove solder from the short land after connecting the card wire.
1M
(caption)
Anti-static wrist strap
Conductive material
(conductive sheet) or iron plate
Mechanism control board
CN102
Pickup
Flexible wire
Short land section
1-6 (No.MA429<Rev.002>)
1.5 Important for laser products
1.CLASS 1 LASER PRODUCT
2.CAUTION :
(For U.S.A.) Visible and/or invisible class II laser radiation
when open. Do not stare into beam.
(Others) Visible and/or invisible class 1M laser radiation
when open. Do not view directly with optical instruments.
3.CAUTION : Visible and/or invisible laser radiation when
open and inter lock failed or defeated. Avoid direct
exposure to beam.
4.CAUTION : This laser product uses visible and/or invisible
laser radiation and is equipped with safety switches which
prevent emission of radiation when the drawer is open and
the safety interlocks have failed or are defeated. It is
dangerous to defeat the safety switches.
5.CAUTION : If safety switches malfunction, the laser is able
to function.
6.CAUTION : Use of controls, adjustments or performance of
procedures other than those specified here in may result in
hazardous radiation exposure.
REPRODUCTION AND POSITION OF LABELS and PRINT
!Please use enough caution not to
see the beam directly or touch it
in case of an adjustment or operation
check.
WARNING LABEL and PRINT
(No.MA429<Rev.002>)1-7
SECTION 2
SPECIFIC SERVICE INSTRUCTIONS
2.1 Identification method
Supported reduction in cost, and board contents was changed.
A set put the following label on is an object.
Top view
Change pwb parts
Front side
Label position
1-8 (No.MA429<Rev.002>)
SECTION 3
DISASSEMBLY
3.1 Main body (Used figure are KD-A305)
3.1.1 Removing the Bottom chassis (See Fig.1, 2)
(1) Remove the two screws Aand one screw Battaching the
Heat sink. (See Fig.1)
(2) Remove the two screws C, two screws Dand one screw E
attaching the Bottom chassis and then slide to backward
the Bottom chassis. (Se Fig.2)
Fig.1
Fig.2
3.1.2 Removing the Front chassis (See Fig.3)
(1) Disengage four hooks aengaged both side of the Front
chassis.
Fig.3
3.1.3 Removing the Main board (See Fig.4, 5)
(1) Remove the two screws Fand one screw Gattaching the
side plate. (See Fig.4)
(2) Remove the three screws Hattaching the Main board. (See
Fig.5)
(3) Disconnect the connector CN501 of the main board from
CD mechanism. (See Fig.5)
Fig.4
Fig.5
AA B
CCDD
E
hook a
FFG
H
CN501
H
(No.MA429<Rev.002>)1-9
3.1.4 Removing the CD mechanism (See Fig.6)
(1) Remove the three screws Jattaching the CD mechanism.
Fig.6
3.1.5 Removing the Switch board (See Fig.7)
(1) Remove the Volume knob.
(2) Remove the four screws Kattaching the Rear cover.
(3) Disengage eleven hooks bengaged Rear cover.
Fig.7
JJ
J
KK
hook b
hook b
1-10 (No.MA429<Rev.002>)
3.1.6 CD MECHANISM assembly section
• Remove the CD MECHANISM assembly from the main body.
3.1.7
Removing the MECHANISM CONTROL BOARD
assembly (See Fig.
1
and
2
)
(1)
From the bottom side of CD MECHANISM assembly,
remove the solders from the soldered sections (
a
,
b
and
c
) on the MECHANISM CONTROL BOARD assembly.
(See Fig.
1
.)
(2) Remove the three screws Aand one screw Battaching the
MECHANISM CONTROL BOARD assembly. (See Fig.1.)
(3) Solder the short land sections on the pickup. (See Fig.2.)
Caution:
• Solder the short land sections on the pickup before
disconnecting the flexible wire from the connector
CN102 on the MECHANISM CONTROL BOARD as-
sembly.
If the card wire is disconnected without attaching
solder, the pickup may be destroyed by static
electricity. (See Fig.
2
.)
•
When attaching the MECHANISM CONTROL
BOARD assembly, remove the solders from the
short land sections after connecting the flexible
wire to the connector CN102 on the MECHANISM
CONTROL BOARD assembly.
Fig.1
Fig.2
A
CN102
Mechanism
control board
A
A
B
b
a
c
Mechanism control board
CN102
Pickup
Flexible wire
Short land section
This manual suits for next models
11
Table of contents
Other JVC Car Receiver manuals
JVC
JVC KD-APD89 User manual
JVC
JVC LVT1134-001A User manual
JVC
JVC KD-SX878R User manual
JVC
JVC KW-X830BT User manual
JVC
JVC KW-M865BW User manual
JVC
JVC KD-SX870 User manual
JVC
JVC F190 - KS Radio / Cassette Player User manual
JVC
JVC KD-SX995 User manual
JVC
JVC KD-Lh401 User manual
JVC
JVC KD-R661 User manual
